Potentially saucy topic here, so we need to be careful how we approach this.
Wuxia fiction isn't all just about fancy martial arts techniques. There are also a number odd sexual fetishes. Madame Ma from DGSD liked to bite the men she fancied. Gung 9 from LUK SIU FUNG liked being whipped. The husband of Lau Ching Ching (Widow Fa, also from LUK SIU FUNG) liked to watch as other men sexually assaulted his wife.
What other weird fetishes from wuxia also caught your attention?